albrecht



(No Model.) 4 Sheets-Sheet 1. J. ALBRECHT.

SOLE SEWING MACHINE.

No. 405,453. Patented June 18, 1889.

WITNESSES: I nvmvroe;

ATTORNEYS.

N. P'ETERS. Pnm-umu n hcr, wmin mm 0.0.

NoMbdeL) 4 SheetsSheet 2. J. ALBRECHT.

SOLE SEWING MAOHINE.

No. 405,453. Patented June 18, 1889.

' III/2W0.

x WITNESSES. l/VI/E/VTOR: A w I By MUM u ATTORNEYS.

(No Model.) 4 Sheets-Sheet 3. J ALBRECHT SOLE SEWING MACHINE.

Patented June 1 1889.

W/T/VESSES:

ATTORNEYS.

N. PETERS. Phokrtilhognphur. Waahiugton. nfc.

(No Model. 4 Sheets8heet 4.

J. ALBRECHT.

SOLE SEWING MACHINE. No. 405,453. Patented June 18, 1889.

Eii -nm WITIVESSES: wvmrom ner the same is to be carried into effect.

UNITED STATES PATENT OFFICE.

JoHANNEs ALBRECHT, or CANNsTADT, WURTEMBEHG, ASSIGNOR TO oTTo HERZ, orFRANKFORT, GERMANY.

SOLE-SEWING MACHINE.

SPECIFICATION forming part of Letters Patent No. 405,453, dated June 18,18 89.

Application filed August 17, 1888. Serial No. 288,053. (No model.)Patented in Germany October 23, 1886, No. 41,153, and in France November23, 1886, No. 179,887.

To all whom it may concern.-

Be it known that I, J oHANNEs ALBRECHT, a subject of the Emperor ofGermany, residing at Oannstadt, Germany, assignor to Otto l-Ierz, ofFrankfort-on-thedvlain, Germany, have invented certain new and usefulImprovements in Sewing-Machines, (which have been patented in Germany,October 23, 1886, No. 41,153, and in France, November 23,1886; No.179,837,) of which the following isa specification.

I, J OHANNES ALBRECHT, of Oannstadt, in the Kingdom of \Viirtemberg,German Empire, mechanic, do hereby declare the nature of this mysaid'invention, and in what man Itis particularly described in andascertained from the following statement, and is represented in theaccompanying drawings.

My invention relates to improvements in sole-sewing machines, and moreespecially to that class of machines which produce the doublelock-stitch; and it has for its object to sew the sole onto the shoe orboot, &c., with waxed threads by means of a hookneedle and of a suitableshuttle.

These improvements are showii in the accompanying drawings, in whichFigure 1 isa side elevation, partly in section; Fig. 2, a frontelevation; and Figs. 3 to 11 are detail views of special partshereinafter described.

The machine is put in motion from the main driving shaft 61, on whicha...iiy-wl1eel b and a grooved disk a and bevel-gearing A are mounted.The end of another shaft a driven by the bevel-gearing A, is connectedby a double universal joint 0 to the shuttledriving mechanism, which itactuates. The shaft a rests in a bearing B and can be moved up and downby a hand-lever D, operating the vertical draw-bar d and compressing thespring at. The needle-bar nreceives its reciprocating vertical motionfrom the lever-arm m, which in its turn is actuated by the grooved diska. (See Figs. 1 and 10.) The shuttle .2 rotates in a case r, (see Figs.1, 2, 3, 5, and 6,) and is operated by a driver 0, mounted on shaft a.The shuttle-case r is provided with an opening r or cutting on its lowerside, and is shoved over bearing B, Fig.

5, to which it is fastened by means of screws or in any other suitablemanner. Shuttle 2 has its points in the same plane as its side,

so that the position of shaft a may be made to incline with respect toneedle-bar n without the lower edge of the shuttle touching the needle,which thus allows the loop of the thread to be hung up upon theshuttle-point, and thus taking it out of the hook of the needle, as isshown in Figs. 7 and 8. Presserring h, surrounding shuttle-ring T, hasits fulcrum in pin h, Fig. 6, and is exactly guided by screws 71 and hadjustably attached to it. These screws h and h penetrate shutt1e-ringrand rest in turn against two cams c and c which, revolving with theshuttle-driver o and shaft (t push alternately against them, and thuspress the ring h one time to the right and another time to the left,while a spring h is permanently tending to push the ring downward and aspring 7r to the right. The downward motion is effected by the cam 6operating against the projection h. The screw it is also anadjusting-screw, serving to regulate the size of the stitches in thefollowing manner, viz: Vixen it is screwed forward, the ring 7L willtravel a greater distance than when the screw is screwed back. Thepresser-point m is screwed to case r an d holds the material being seweddown upon the top of thehorn it. To the presser-ring h is attached thefeed-arm X, which, coming into operation alternately with thepresser-point ac, follows the motion imparted to the ring h by the camse e and springs, as afterward described, and thus moves the stuffforward after each stitch has been finished and as soon as the needlehas moved up out of the stuff. 0

The horn P is made movable in its bearing 19 in the ordinary manner,projecting from the frame of the machine.

The horn P is given the shape shown in Fig. 1, in order that ahigh-legged boot will take its proper place and can be easily guidedwhen being sewed. This shape of the horn allows, further, that the lowerthread passes up the inside of the horn in nearly a vertical direction,bywhich the mechanism is very much simplified, whereas in othersewing-machines with horns known hitherto the thread has had to pass asharp angle or two.

The take-up lever K receives its reciprocating motion from the grooveddrum K, which is attached to and rotated by the shaft 70, and carries atits front end the vertical bar 75?, (see Fig. 2,) which has a take-uproller u at its top end and is guided on the rod n, which latter isjournaled in bearings at its top and bottom ends, and at its top end isin gearing with the rod 1). The rod 2; is connected at its upper end bya small universal joint with the rod 1 which latter drives at its topend a whirl of :the ordinary construction in the ordinary manner. Thethread, starting from the spool E, passes over and is guided by therolls 9, take-up roller u, and rolls g and g to the whirl. The rod v isgeared at its lower end witl the rod V, which in its turn is geared withthe rod 70', from which it receives its motion, and is kept in rotationas long as the machine moves. The consequence" of this will be that therods 4) EUICTZ arG also rotated, causing the thread to be laid upon thehook of the needle as soon as it has passed through the work. When theneedle moves up again, the thread goes up with it through the work,whereupon the shuttle passes through the loop in the manner described,after which the take-up pulls the loop back over the shuttle, thusproducing, together with the shuttle-thread, a perfect stitch.

In the upper part of the machine is situated the bearing B, beforenamed, which, together with the shuttle 2, case r, and presser x, withring it, can be lifted by lever D, Fig. 2, as before described, and thecloth or leather passed between these parts and the horn.

During the passage of the needle up through the stuff a locking devicecomes into operation, which holds the bearing B, with the case rand'presser-point 00, together with the ring h and feed-arm X,fir1nlydown upon the work being sewed. This locking device is represented inFigs. 4 and 1. It consists of the arm S and spring S, both attached attheir top ends to the frame of the machine. The lower end of the arm Shas a claw s, which holds in the rack .9, this latter being attached tothe bearing B. Below this claw s is situated the projection s on the armS. On the shaft a which operates the shuttle-driver, as beforedescribed, is situated the cam b, which is so adjusted to said shaft athat at the moment the needle arrives at its highest point and isperfectly free fromthe stuff the cam b" presses against the projections, and thus withdraws the claw s from the rack s. This happens at thesame moment that the feeding of the work is effected. As soon as the cam1)" passes away from s the spring S draws back the arm b thus againlocking down the bearing B. The lever D is now lowered, thus bringingthe presser down again upon the work, whereupon the machine is started.By these means needle f will go back and take up lever K, together withthread-roll u, and move upward until the shuttle has come into theposition shown in Fig. 9. In the moment the needle has arrived inposition, Fig. 7, the shuttle enters the thread-loop and draws along thethread as much as is necessary for its passage, whereby the thread istaken off the hook of the needle, Fig. 8. When the shuttle and theneedle are in position,'Fig. 9, the thread-lever K moves down and drawsthe thread fight.

It must be mentioned that before the thread has been drawn tight cam 6has pushed against check h, and has thus pressed the presser-foot a:against the cloth or soleleather. The presser-footas will be raisedagain as soon as spring cis compressed above the bearing B. Cam e nowpresses against set-screw 7L2, and so moves the material to the left.The cam c has now come in contact with the projection hf, pressing downthe feet-point 00' into the'mater'ial, whereupon the cam e pushesagainst the screw 72 moving the feet-point 0c forward. As soon as thecams e and e have ceased to act the springs 77. and 71 return 71- to itsoriginal position. The shuttle z is held up against the front of theshuttle-case r by the spring z. It will thus be seen that the springsand the presser, in combination with the set-screws, and together withthe shuttle, will adjust themselves automatically, according to thethickness or" the material to be sewed. As soon as the presser has goneback the needle will make a new stitch, and all movements of theoperating parts will commence anew.

Having thus described my invention and the manner of employing the same,what I claim as my invention, and wish to have secured to me by LettersPatent of the United States of America, is

1. In a sole-sewing machine with astraight vertical needle, a shuttlerotating in its case in a vertical plane behind the said needle abovethe stuff or material being sewed, in combination with the shuttle-case,the vertically-yielding bar d, carrying said case, the bearing B, andthe universally-jointed shuttle-driving shaft, whereby an automaticadjustment to the thickness of the stuff is effected, substantially inthe manner as described.

2. In a sole-sewing machine, the combination, with the verticallyyielding bar d, the shuttle case r, carried thereby, and thepresser-foot 00, attached to the shuttle-case r, of the pivc tedpresser-ring h, the feed-arm X, secured thereto, the shaft a and thecams 6 e formed thereon, all arranged substantially as shown, and forthe purpose described.

3. In a sole-sewing machine, the combination, with the shaft a and thecams e and 6 1o tions 3 0n the arm S, earn b attached to theslnitt-le-driving shaft a bearing B, shuttlecase 1", presser-point 00,together with the ring h and feed-arm X.

In testimony whereof I have signed my name to this specification in thepresence of two sub- I 5 scribing witnesses.

J OI-IANNES ALBRECHT. lVitnesses:

HERMANN C. GROS, ALvEsTo S. HOGUE.

